Suicide

Suicide is an unofficial term used to describe when a monster purposely attacks another with an equal or greater ATK, which (on success) would guarantee the said monster to be destroyed (sent to graveyard). This is in opposite with the standard approach of not attacking monster that would cause the attacker monster to be destroyed in the process. This is also commonly called ramming, kamikaze, or - in cases when the monsters have equal ATK - a double KO or crashing. It is worth noting that if two monsters with 0 ATK attack each other, neither will be destroyed.